Leinster Lad Posted March 25, 2021 Share Posted March 25, 2021 (edited) pretty sure my mud map schematic is correct not correct !!! Edited March 26, 2021 by Leinster Lad Link to comment Share on other sites More sharing options...
Leinster Lad Posted March 25, 2021 Share Posted March 25, 2021 Link to comment Share on other sites More sharing options...
Leinster Lad Posted March 25, 2021 Share Posted March 25, 2021 pretty sure my mud map schematic is NOT completely correct ! I'll meter it out and advise Link to comment Share on other sites More sharing options...
Leinster Lad Posted March 25, 2021 Share Posted March 25, 2021 Link to comment Share on other sites More sharing options...
kukynas Posted March 25, 2021 Author Share Posted March 25, 2021 if that's the case than it would look like this Link to comment Share on other sites More sharing options...
Leinster Lad Posted March 26, 2021 Share Posted March 26, 2021 (edited) not quite correct, the neutral line is direct to output (not thru any diodes) The common point of the diodes in the neutral are only connected to one cap and the resistor also with a 1 meg resistor tying the negative legs of the caps together Edited March 26, 2021 by Leinster Lad Link to comment Share on other sites More sharing options...
Leinster Lad Posted March 26, 2021 Share Posted March 26, 2021 Like this. Link to comment Share on other sites More sharing options...
kukynas Posted March 26, 2021 Author Share Posted March 26, 2021 Ah ok, I thought from the picture that each side is connected to the AC terminals Link to comment Share on other sites More sharing options...
Leinster Lad Posted March 26, 2021 Share Posted March 26, 2021 So did I , but my trusty fluke tells me otherwise ! Link to comment Share on other sites More sharing options...
kukynas Posted March 26, 2021 Author Share Posted March 26, 2021 then I'm even more confused Link to comment Share on other sites More sharing options...
deafenears Posted March 28, 2021 Share Posted March 28, 2021 iFi just came out with a new DC blocker device http://ifi-audio.com/products/dc-blocker/ 1 Link to comment Share on other sites More sharing options...
deafenears Posted March 28, 2021 Share Posted March 28, 2021 https://addictedtoaudio.com.au/products/ifi-audio-dc-blocker Link to comment Share on other sites More sharing options...
Leinster Lad Posted April 10, 2021 Share Posted April 10, 2021 Bigger diodes and caps fitted. Now to soak test. 1 Link to comment Share on other sites More sharing options...
mwhouston Posted April 10, 2021 Share Posted April 10, 2021 3 hours ago, Leinster Lad said: Bigger diodes and caps fitted. Now to soak test. Not convinced, here, bigger is better. I do like these modules though. Link to comment Share on other sites More sharing options...
Leinster Lad Posted April 10, 2021 Share Posted April 10, 2021 ? so when the original diodes and caps were sighted right here that they were probs inadequate, ie, diodes rated at 3 amps would be too small. Caps were too small and not high enough ESR. Should I not have bothered? Link to comment Share on other sites More sharing options...
Leinster Lad Posted April 10, 2021 Share Posted April 10, 2021 Diodes are now 600 prv @ 30 amp (325 amp surge) ON semi Caps are now 7300uF 0.019 ohm ESR and 6800 mAh ripple Nichicon Link to comment Share on other sites More sharing options...
Monkeyboi Posted April 10, 2021 Share Posted April 10, 2021 7 hours ago, Leinster Lad said: ? so when the original diodes and caps were sighted right here that they were probs inadequate, ie, diodes rated at 3 amps would be too small. Caps were too small and not high enough ESR. Should I not have bothered? If you were pulling more than 3A, then the original diodes would be inadequate IMHO and IME most likely to fail prematurely. Nothing wrong with using large value capacitors with a lower ESR. Firstly they will have a lower loss and dissipation and the Nichicons are a good choice, and secondly they will most likely last longer than the "no name" types. The point of the whole exercise is does the unit effectively block any d.c. content present on the mains? IME, most Chinese designed devices have overly inflated specifications and at best achieve about 50% of whatever they are rated at. With this board sporting its original components, a claim of 10A continuous current delivery using 3A diodes is overly optimistic. Cheers, Alan Link to comment Share on other sites More sharing options...
Auracle Posted April 11, 2021 Share Posted April 11, 2021 Been holding my tongue on this one. But since it involves mains electricity, I'll add my 2 cents worth. I'm with Alan on this. The schematic (as drawn) is NQR for a proper dc blocking arrangement. Power up at your own risk, but don't expect the function to be up to par with other units, even with the up-rated components. You may also find that those caps may not last the distance either because of their placement in the circuit. Good luck Leinster Lad. 1 Link to comment Share on other sites More sharing options...
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